<template>
    <div class="login">
      <el-form ref="loginRef" :model="loginForm" :rules="loginRules" class="login-form">
        <el-form-item prop="username">
          <el-input
            v-model="loginForm.username"
            type="text"
            size="large"
            auto-complete="off"
            placeholder="请输入手机号"
          >
            <template #prefix><svg-icon icon-class="user" class="el-input__icon input-icon" /></template>
          </el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="loginForm.password"
            type="password"
            size="large"
            auto-complete="off"
            placeholder="请输入短信验证码"
            @keyup.enter="handleLogin"
          >
            <template #prefix><svg-icon icon-class="password" class="el-input__icon input-icon" /></template>
          </el-input>
        </el-form-item>
        <el-form-item style="width:100%;">
          <el-button
            :loading="loading"
            size="large"
            type="primary"
            style="width:100%;"
            @click.prevent="handleLogin"
          >
            <span v-if="!loading">登 录</span>
            <span v-else>登 录 中...</span>
          </el-button>
          <div style="float: right; margin-top:20px" v-if="register">
            <router-link class="link-type" style="" :to="'/register'">立即注册</router-link>
          </div>
        </el-form-item>
      </el-form> 
    </div>
  </template>
  
  <script setup>
  import { getCodeImg } from "@/api/login";
  import Cookies from "js-cookie";
  import { encrypt, decrypt } from "@/utils/jsencrypt";
  import useUserStore from '@/store/modules/user'
  
  const userStore = useUserStore()
  const router = useRouter();
  const { proxy } = getCurrentInstance();
  
  const loginForm = ref({
    username: "",
    password: "",
    rememberMe: false,
    code: "",
    uuid: ""
  });
  
  const loginRules = {
    username: [{ required: true, trigger: "blur", message: "请输入您的账号" }],
    password: [{ required: true, trigger: "blur", message: "请输入您的密码" }],
    code: [{ required: true, trigger: "change", message: "请输入验证码" }]
  };
  
  const codeUrl = ref("");
  const loading = ref(false);
  // 验证码开关
  const captchaEnabled = ref(true);
  // 注册开关
  const register = ref(true);
  const redirect = ref(undefined);
  
  function handleLogin() {
    proxy.$refs.loginRef.validate(valid => {
      if (valid) {
        loading.value = true;
        // 勾选了需要记住密码设置在 cookie 中设置记住用户名和密码
        if (loginForm.value.rememberMe) {
          Cookies.set("username", loginForm.value.username, { expires: 30 });
          Cookies.set("password", encrypt(loginForm.value.password), { expires: 30 });
          Cookies.set("rememberMe", loginForm.value.rememberMe, { expires: 30 });
        } else {
          // 否则移除
          Cookies.remove("username");
          Cookies.remove("password");
          Cookies.remove("rememberMe");
        }
        // 调用action的登录方法
        userStore.login(loginForm.value).then(() => {
          router.push({ path: redirect.value || "/" });
        }).catch(() => {
          loading.value = false;
          // 重新获取验证码
          if (captchaEnabled.value) {
            getCode();
          }
        });
      }
    });
  }
  
  function getCode() {
    getCodeImg().then(res => {
      captchaEnabled.value = res.captchaEnabled === undefined ? true : res.captchaEnabled;
      if (captchaEnabled.value) {
        codeUrl.value = "data:image/gif;base64," + res.img;
        loginForm.value.uuid = res.uuid;
      }
    });
  }
  
  function getCookie() {
    const username = Cookies.get("username");
    const password = Cookies.get("password");
    const rememberMe = Cookies.get("rememberMe");
    loginForm.value = {
      username: username === undefined ? loginForm.value.username : username,
      password: password === undefined ? loginForm.value.password : decrypt(password),
      rememberMe: rememberMe === undefined ? false : Boolean(rememberMe)
    };
  }
  
  getCode();
  getCookie();
  </script>
  
  <style lang='scss' scoped>
  .login {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    background: #ffffff;
  }
  
  .login-form {
    background: #ffffff;
    width: 100%;
    padding: 25px 25px 5px 25px;
    .el-input {
      height: 40px;
      input {
        height: 40px;
      }
    }
    .input-icon {
      height: 39px;
      width: 14px;
      margin-left: 0px;
    }
  }
  .login-tip {
    font-size: 13px;
    text-align: center;
    color: #bfbfbf;
  }
  </style>
  